If your batteries are fully charged then it would only have a get .1 amp going into the batteries. Is this reading before or after that Solar Controller? Run your batteries down to less than 75% and then you should see that amps jump up
BTW is this reading before or after that Solar Controller?
The reason I ask is if this is after the controller you should not be having a 17 volt reading. If before the controller this is normal voltage coming off the solar panels.
Sorry I missed that you are working with a 24v panel. There can be several things wrong, the easiest being is the panel in full bright sunlight? If not wait until between noon and 1pm and check again.
The voltage should be higher but the amps will be low due to the high charge state of the batteries but not that low.
Have you checked the voltage right at the panel?
How long is your run and what is the wire gauge from the panel to the panel to the controller?
What is the programmed "charge voltage" from the controller? Voltage differential matters, if the voltage differential is small the potential for power transfer decreases.
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